I have same problem with 75u68g hisense. Tcon swap didn't help.
Backlight on. I can see a white smear like 99% blur but motion can be observed.
When left side of tcon remove white and black flashes on left side. When right side of tcon removed all black screen.
Is there something likely to check or swap? I'm gathering maybe something on the thin board between the tcon and the panel could be a problem?...
WhatsTheDellio
Member
Last Activity: 07-28-2024, 08:21 AM
Joined: 01-24-2023
Location: canada
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Re: dell 3567 / AC fine, but Battery not charging and CPU @ 0.4ghz if battery not rem
i measured the PL4401 again tonight and it seemed to pulse between 0mv and 30mv.. not sure if i'm getting some interference or if that is expected... where in the schematic should I be able to read the expected voltage of these pins?...Leave a comment:
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Re: dell 3567 / AC fine, but Battery not charging and CPU @ 0.4ghz if battery not rem
I've got this currently, never used flux before. will it do?
MG Chemicals 8341 No Clean Flux Paste, 10 ml Pneumatic Dispenser (Complete with Plunger & Dispensing Tip) (8341-10ML) [url]https://a.co/d/98yRVBo[/url]
i looking at this drag solder with an iron [url]https://youtu.be/Fwx_qzfwdgk[/url] he calls it soldering paste but it looks like flux paste to me... maybe I'm wrong?
also this chip looks closer to mine (only pads on the bottom) so I guess this...Last edited by WhatsTheDellio; 01-27-2023, 07:24 AM.Leave a comment:
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Re: dell 3567 / AC fine, but Battery not charging and CPU @ 0.4ghz if battery not rem
integrated graphics Intel HD 3000.
The only difference is I swapped out the old HDD for an SDD but that wouldn't require a different power adapter.
tried 2 different genuine Dell adapters. and 3 batteries (2 genuine Dell and 1 3rd party all behave same way).
replaced the DC jack on motherboard.
The throttle only applies when battery is installed. if I remove battery there is no throttle. And while the battery is not charging I see no reason...Last edited by WhatsTheDellio; 01-27-2023, 06:54 AM.Leave a comment:
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Re: dell 3567 / AC fine, but Battery not charging and CPU @ 0.4ghz if battery not rem
I already discharged the battery to 80% since taking that picture. it says charging but current is still 0ma on bios. I just don't have a screenshot.
I saw a YouTube video where someone with similar model replaced their ncp81208 and I was going to do this first before I realized this forum exists where I might actually learn how to read the schematic and work through it systematically instead of anecdotally.
Aside, is there a good description of that...Leave a comment:
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Re: dell 3567 / AC fine, but Battery not charging and CPU @ 0.4ghz if battery not rem
this is the AC adapter that comes with this model laptop. I tried two of them. not faulty. swapped internal ac wire on the board too. all parts have been swapped out except the motherboard.
i did give the measurements right? or did I miss one?
PU4301
PIN1 = 19.4v
PIN4 = 3.13v
PIN8 = 19.44V (PINS 7&8 are joint in same solder, as is 5&6)
PQ4410 for Pin 1/4/8.
PIN1=19.4V
PIN4=1.77VPIN8=19.44V (PINS 7&8 are joint in...Leave a comment:
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Re: dell 3567 / AC fine, but Battery not charging and CPU @ 0.4ghz if battery not rem
I guess I found the schematic here in pdf. I don't know what I was trying to open before. How do I interpret this thing to follow the flow of power?
[url]https://www.badcaps.net/forum/attachment.php?attachmentid=215601&d=1594378972[/url]Re: dell 3567 / AC fine, but Battery...ow the flow ofLeave a comment:
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Re: dell 3567 / AC fine, but Battery not charging and CPU @ 0.4ghz if battery not rem
[url]https://www.badcaps.net/forum/attachment.php?attachmentid=253902&d=1642585030[/url]
on PL4401 is 0V because it only has two pins (contacts really) and they both read 0V on a mtimeter range setting of 20V.Re: dell 3567 / AC fine, but Battery...they both readLeave a comment:
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Re: dell 3567 / AC fine, but Battery not charging and CPU @ 0.4ghz if battery not rem
Not sure if I tested it correctly, but PL4401 measure 0V on both sides when I press my black probe to ground and red probe to each terminal... is this the wrong method to test voltage? Or is the component faulty?Leave a comment:
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Re: dell 3567 / AC fine, but Battery not charging and CPU @ 0.4ghz if battery not rem
I'm fully capable of doing this, just not on the first try... or the second...
I tried like 5 different tools to view the .CAD file in the schematics thread for this board but it wouldn't load any of them... While you're here, can you throw me a bone and tell me which software I can easily acquire that will open the .cad file?...
Leave a comment:
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Re: dell 3567 / AC fine, but Battery not charging and CPU @ 0.4ghz if battery not rem
hmmm.... I should have measured in DC, not AC, right?
Next measure voltage on PU4301
PIN1 = 19.4v
PIN4 = 3.13v
PIN8 = 19.44V (PINS 7&8 are joint in same solder, as is 5&6)
PQ4410 for Pin 1/4/8.
PIN1=19.4V
PIN4=1.77V
PIN8=19.44V (PINS 7&8 are joint in same solder, as is 5&6)...Last edited by WhatsTheDellio; 01-26-2023, 04:19 PM.Leave a comment:
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Re: dell 3567 / AC fine, but Battery not charging and CPU @ 0.4ghz if battery not rem
PIN1 = 42.1v
PIN4 = 6.1v
PIN8 = 42.1V (PINS 7&8 are joint in same solder, as is 5&6)
PIN1=42.1V
PIN4=3.2V
PIN8=42.1V (PINS 7&8 are joint in same solder, as is 5&6)
PL4401 I'm not sure how to test... looking that up now. It is labelled 4R7 734 VCM and seems to have only 2 pins?...Last edited by WhatsTheDellio; 01-26-2023, 01:15 PM.Leave a comment:
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Re: dell 3567 / AC fine, but Battery not charging and CPU @ 0.4ghz if battery not rem
Image from bios...Last edited by WhatsTheDellio; 01-25-2023, 06:41 AM.Leave a comment:
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Re: dell 3567 / AC fine, but Battery not charging and CPU @ 0.4ghz if battery not rem
Bios shows the correct wattage.
Bios also reports status of battery as charging, but reports current as 0 mA. (the battery said charging before, I think it shows idle in the screenshot below because it was nearly full and wasn't calling for a charge)Last edited by WhatsTheDellio; 01-25-2023, 06:44 AM.Leave a comment:
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dell 3567 / AC fine, but Battery not charging and CPU @ 0.4ghz if battery not removed
thanks in advance for any help you can give.
i have a vegus/turis skl/kbl
15341-1
91N85
this came to me with broken hinges so I lovingly acquired the parts I needed and reassembled it all to find everything working except for the battery. It was @ 30% and drained to zero while installing the OS. When plugged in the laptop works. CPU at 100% when no battery installed and only 0.4ghz if battery and AC are both plugged in.
i tried 3 different batteries and 2 different chargers so it's down to motherboard.
IR camera doesn't... -
Re: New Members - please post your introductions here
I'm happy to have found this place. I've repaired TV's by replacing capacitors and done some basic troubleshooting before. most problems I fix are by following instructions others have posted before. I'm mostly here because my most complicated fix is now upon me. My laptop is powered by AC, but when the Battery is plugged in it will not charge it and will drop the CPU to 0.4ghz as some kind of protection I think. I'm fairly certain resoldering one of the components will solve it, but which one? that's why I'm here. to learn...Leave a comment:
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